/Engine/Source/Runtime/Datasmith/CADKernel/Public/CADKernel/Topo/TopologicalEdge.h
Return the tangent at the input vertex
[FPoint](API\Runtime\CADKernel\CADKernel\Math\FPoint) GetTangentAt ( const [FTopologicalVertex](API\Runtime\CADKernel\CADKernel\Topo\FTopologicalVertex) & InVertex )